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A kind of building plastic formwork and preparation method thereof

A technology for plastic formwork and construction, used in chemical instruments and methods, layered products, synthetic resin layered products, etc., can solve the problems of waterproof layer damage, difficult to recycle, damage, etc., to reduce cleaning, high turnover, water resistance, etc. good performance

Inactive Publication Date: 2016-09-21
HONGHU EWANG PLASTIC PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the hydrophilic nature of bamboo itself, the waterproof layer is damaged after repeated use, and it is easy to cause deformation and damage after being damp.
What's more serious is that after the bamboo formwork is damaged, it is not easy to recycle, and a large amount of construction waste will be formed

Method used

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  • A kind of building plastic formwork and preparation method thereof
  • A kind of building plastic formwork and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1) The mass percentages of raw materials for the preparation of the middle layer are as follows: 25% polyethylene, 45% polypropylene copolymer, 20% polypropylene fiber, 7% double fly powder and 3% polyether modified polysiloxane, heat the mixer to 38 ℃, and then add the above-mentioned raw material components into the mixer and mix for 10 minutes.

[0030] 2) Feed the homogeneously mixed material in step 1) to the plastic single-screw extruder SJ90 for plasticization. The temperature is 170°C, the temperature in the fourth zone is 180°C, the temperature in the fifth zone is 190°C, the temperature in the sixth zone is 170°C, and the screw speed is 50 rpm.

[0031] 3) Feed the copolymerized polypropylene to another plastic single-screw extruder SJ90 for plasticization, and control the temperature of the first zone of the single-screw extruder barrel to 160°C, the temperature of the second zone to 165°C, and the temperature of the third zone to 170 ℃, the temperature in t...

Embodiment 2

[0044] 1) The mass percentages of raw materials for the preparation of the middle layer are as follows: 35% polyethylene, 42.5% polypropylene copolymer, 18% polypropylene fiber, 3% double fly powder and 1.5% carboxylic acid-N-alkylamide, heat the mixer to 38 ℃, and then add the above-mentioned raw material components into the mixer and mix for 15 minutes.

[0045] 2) Feed the homogeneously mixed materials in step 1) to the single-screw extruder SJ90 for plasticization, and control the temperature of the first zone of the barrel of the single-screw extruder to 195°C, the temperature of the second zone to 170°C, and the temperature of the third zone The temperature in zone 4 is 180°C, the temperature in zone 4 is 190°C, the temperature in zone 5 is 180°C, the temperature in zone 6 is 180°C, and the screw speed is 80 rpm.

[0046] 3) Feed the copolymerized polypropylene into another single-screw extruder SJ90 for plasticization, and control the temperature of the barrel of the si...

Embodiment 3

[0049] 1) The mass percentages of raw materials for the preparation of the middle layer are as follows: 31% polyethylene, 37.5% polypropylene copolymer, 25% polypropylene fiber, 5% double fly powder and 1.5% polyether modified polysiloxane, heat the mixer to 42°C , and then add the above-mentioned raw material components into the mixer and mix for 13 minutes.

[0050] 2) Feed the homogeneously mixed material in step 1) into the single-screw extruder for plasticization, and control the temperature of the first zone of the single-screw extruder barrel to 190°C, the temperature of the second zone to 165°C, and the temperature of the third zone to be 175°C, the temperature in the fourth zone is 185°C, the temperature in the fifth zone is 185°C, the temperature in the sixth zone is 170°C, and the screw speed is 70 rpm.

[0051] 3) Feed the copolymerized polypropylene to another single-screw extruder for plasticization, and control the temperature of the barrel of the single-screw e...

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Abstract

The invention discloses a building plastic formwork and a preparation method thereof. The formwork consists of an upper layer, a lower layer and a middle layer, wherein the upper layer and the lower layer are both prepared from co-polypropylene, the middle layer is prepared from the following raw materials in percentage by weight: 25%-35% of polyethylene, 37.5%-45% of co-polypropylene, 18%-25% of polypropylene fiber, 3%-7% of calcium-magnesium powder and 1.5%-3% of a defoaming agent. The preparation method comprises the following steps: 1), mixing raw materials of the middle layer uniformly; 2), loading the uniformly mixed raw materials in step 1) for plastification; 3), performing plastification on co-polypropylene and performing vertical dividing; 4), performing extrusion forming on extruded and plastified materials in step 2) and materials subjected to dividing in step 3) simultaneously, cooling and polishing, and making air holes and nail holes, naturally cooling after punching, and finally performing edge cutting, shaping and dimensioning. The building plastic formwork has the advantages that good waterproofness, wear resistance, toughness, high stress resistance, high easiness in demoulding are realized, and the formwork can be repeatedly used and recycled. The preparation method is simple in process, low in preparation cost and suitable for industrial production.

Description

technical field [0001] The invention relates to the technical field of building formwork, in particular to a building plastic formwork and a preparation method thereof. Background technique [0002] In the construction of houses, bridges, tunnels and bricks, etc., the concrete pouring process is often used. [0003] The concrete pouring process requires building formwork. The traditional building formwork uses wood formwork and steel formwork. Due to the lack of timber resources and the enhancement of people's awareness of forest protection, wood formwork has gradually withdrawn from the market. Steel formwork can meet the needs of the construction industry, but steel and cement have a good affinity, and steel is easy to rust, which makes it difficult to release the steel after construction. It is necessary to coat a layer of release agent before use, which not only causes The construction is cumbersome, and the demoulding machine is very easy to pollute the steel bar or t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/14C08L23/06C08K7/06C08K3/26B29C47/92B29C48/92
CPCB29C48/92B29C2948/92704B32B27/06B32B27/20B32B2250/03B32B2250/40B32B2305/028C08L23/14C08L2205/035C08L2205/16E04G9/05C08L23/06C08L23/12C08L83/12C08K2003/265
Inventor 罗时银
Owner HONGHU EWANG PLASTIC PROD
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